* compile.c (iseq_compile_each/NODE_RESBODY): fix to add

  additional nop to prevent tailcall optimization.
* vm_opts.h: clean up comments.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13112 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 0 deletions

diff --git a/compile.c b/compile.c
index a5e997bd92..6e9caba554 100644
--- a/compile.c
+++ b/compile.c
@@ -3119,6 +3119,9 @@ iseq_compile_each(rb_iseq_t *iseq, LINK_ANCHOR *ret, NODE * node, int poped)
 	    ADD_INSNL(ret, nd_line(node), jump, label_miss);
 	    ADD_LABEL(ret, label_hit);
 	    COMPILE(ret, "resbody body", resq->nd_body);
+	    if (iseq->compile_data->option->tailcall_optimization) {
+		ADD_INSN(ret, nd_line(node), nop);
+	    }
 	    ADD_INSN(ret, nd_line(node), leave);
 	    ADD_LABEL(ret, label_miss);
 	    resq = resq->nd_head;